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* [SelectionDAG] Fixed f16-from-vector promotion problemTim Renouf2018-01-091-0/+26
Summary: In the case of an fp_extend of v1f16 to v1f32 where the v1f16 is the result of a bitcast from i16, avoid creating an illegal fp16_to_fp where the input is not a vector and the result is a v1f32. V2: The fix is now to avoid vector scalarization creating a v1->scalar bitcast. Reviewers: srhines, t.p.northover Subscribers: nhaehnle, llvm-commits, dstuttard, t-tye, yaxunl, wdng, kzhuravl, arsenm Differential Revision: https://reviews.llvm.org/D41126 llvm-svn: 322120
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